/Engine/Source/Runtime/CoreUObject/Public/UObject/PackageTrailer.h
Allows the caller to replace a payload in the builder that is already marked as virtualized and replace it with one that will be stored locally.
true if a virtualized payload was replaced, false if the payload was not in the builder at all
bool UpdatePayloadAsLocal ( const [FIoHash](API\Runtime\Core\IO\FIoHash) & Identifier, [FCompressedBuffer](API\Runtime\Core\Compression\FCompressedBuffer) Payload )